code: def dump_npy(obj, filename, zipped=False):
      """
      Saves an object to file using the numpy format.
      :param obj: the object to save
      :param filename: a string or file-like object
      :param zipped: boolean, whether to save the object in the zipped format .npz
      rather than .npy
      """
      if zipped:
          np.savez(filename, obj)
      else:
          np.save(filename, obj)
  
imports: import ast
  import sys
  import joblib
  import networkx
  import numpy
  import pandas
  import scipy.sparse
  from spektral.data.graph import Graph
label_desc: Use image node_id 8 for calling a global function with example usage: dump_npy(obj, filename, zipped) without return types